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Commit 2b6c0cee authored by Andrew Vasquez's avatar Andrew Vasquez Committed by James Bottomley
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[SCSI] qla2xxx: Add ISP24xx IOCB manipulation routines. 



Add ISP24xx IOCB manipulation routines.

Add appropriate glue-code for ISP24xx support while
manipulting IOCB packets.  Add an ISP24xx specific
'start_scsi' routine due to command-type-7 layout
changes.

Signed-off-by: default avatarAndrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent 459c5378

drivers/scsi/qla2xxx/qla_gbl.h

+1 −0
Original line number Diff line number Diff line
@@ -94,6 +94,7 @@ extern uint16_t qla2x00_calc_iocbs_64(uint16_t); 
extern void qla2x00_build_scsi_iocbs_32(srb_t *, cmd_entry_t *, uint16_t);

extern void qla2x00_build_scsi_iocbs_64(srb_t *, cmd_entry_t *, uint16_t);

extern int qla2x00_start_scsi(srb_t *sp);

extern int qla24xx_start_scsi(srb_t *sp);

int qla2x00_marker(scsi_qla_host_t *, uint16_t, uint16_t, uint8_t);

int __qla2x00_marker(scsi_qla_host_t *, uint16_t, uint16_t, uint8_t);

drivers/scsi/qla2xxx/qla_inline.h

+13 −0
Original line number Diff line number Diff line
@@ -236,6 +236,19 @@ qla2x00_delete_timer_from_cmd(srb_t *sp) 
	}

}



static inline uint8_t *host_to_fcp_swap(uint8_t *, uint32_t);

static inline uint8_t *

host_to_fcp_swap(uint8_t *fcp, uint32_t bsize)

{

       uint32_t *ifcp = (uint32_t *) fcp;

       uint32_t *ofcp = (uint32_t *) fcp;

       uint32_t iter = bsize >> 2;



       for (; iter ; iter--)

               *ofcp++ = swab32(*ifcp++);



       return fcp;

}



static inline int qla2x00_is_reserved_id(scsi_qla_host_t *, uint16_t);

static inline int

drivers/scsi/qla2xxx/qla_iocb.c

+309 −16
Original line number Diff line number Diff line
@@ -472,25 +472,33 @@ int 
__qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun,

    uint8_t type)

{

	mrk_entry_t	*pkt;

	mrk_entry_t *mrk;

	struct mrk_entry_24xx *mrk24;



	pkt = (mrk_entry_t *)qla2x00_req_pkt(ha);

	if (pkt == NULL) {

		DEBUG2_3(printk("%s(): **** FAILED ****\n", __func__));

	mrk24 = NULL;

	mrk = (mrk_entry_t *)qla2x00_req_pkt(ha);

	if (mrk == NULL) {

		DEBUG2_3(printk("%s(%ld): failed to allocate Marker IOCB.\n",

		    __func__, ha->host_no));



		return (QLA_FUNCTION_FAILED);

	}



	pkt->entry_type = MARKER_TYPE;

	pkt->modifier = type;



	mrk->entry_type = MARKER_TYPE;

	mrk->modifier = type;

	if (type != MK_SYNC_ALL) {

		pkt->lun = cpu_to_le16(lun);

		SET_TARGET_ID(ha, pkt->target, loop_id);

		if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {

			mrk24 = (struct mrk_entry_24xx *) mrk;

			mrk24->nport_handle = cpu_to_le16(loop_id);

			mrk24->lun[1] = LSB(lun);

			mrk24->lun[2] = MSB(lun);

		} else {

			SET_TARGET_ID(ha, mrk->target, loop_id);

			mrk->lun = cpu_to_le16(lun);

		}

	}

	wmb();



	/* Issue command to ISP */

	qla2x00_isp_cmd(ha);



	return (QLA_SUCCESS);
@@ -521,7 +529,7 @@ qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun, 
static request_t *

qla2x00_req_pkt(scsi_qla_host_t *ha)

{

	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;

	device_reg_t __iomem *reg = ha->iobase;

	request_t	*pkt = NULL;

	uint16_t	cnt;

	uint32_t	*dword_ptr;
@@ -532,7 +540,12 @@ qla2x00_req_pkt(scsi_qla_host_t *ha) 
	for (timer = HZ; timer; timer--) {

		if ((req_cnt + 2) >= ha->req_q_cnt) {

			/* Calculate number of free request entries. */

			cnt = qla2x00_debounce_register(ISP_REQ_Q_OUT(ha, reg));

			if (IS_QLA24XX(ha) || IS_QLA25XX(ha))

				cnt = (uint16_t)RD_REG_DWORD(

				    &reg->isp24.req_q_out);

			else

				cnt = qla2x00_debounce_register(

				    ISP_REQ_Q_OUT(ha, &reg->isp));

			if  (ha->req_ring_index < cnt)

				ha->req_q_cnt = cnt - ha->req_ring_index;

			else
@@ -586,7 +599,7 @@ qla2x00_req_pkt(scsi_qla_host_t *ha) 
void

qla2x00_isp_cmd(scsi_qla_host_t *ha)

{

	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;

	device_reg_t __iomem *reg = ha->iobase;



	DEBUG5(printk("%s(): IOCB data:\n", __func__));

	DEBUG5(qla2x00_dump_buffer(
@@ -601,6 +614,286 @@ qla2x00_isp_cmd(scsi_qla_host_t *ha) 
		ha->request_ring_ptr++;



	/* Set chip new ring index. */

	WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index);

	RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg));	/* PCI Posting. */

	if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {

		WRT_REG_DWORD(&reg->isp24.req_q_in, ha->req_ring_index);

		RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);

	} else {

		WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp), ha->req_ring_index);

		RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));

	}



}



/**

 * qla24xx_calc_iocbs() - Determine number of Command Type 3 and

 * Continuation Type 1 IOCBs to allocate.

 *

 * @dsds: number of data segment decriptors needed

 *

 * Returns the number of IOCB entries needed to store @dsds.

 */

static inline uint16_t

qla24xx_calc_iocbs(uint16_t dsds)

{

	uint16_t iocbs;



	iocbs = 1;

	if (dsds > 1) {

		iocbs += (dsds - 1) / 5;

		if ((dsds - 1) % 5)

			iocbs++;

	}

	return iocbs;

}



/**

 * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7

 * IOCB types.

 *

 * @sp: SRB command to process

 * @cmd_pkt: Command type 3 IOCB

 * @tot_dsds: Total number of segments to transfer

 */

static inline void

qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt,

    uint16_t tot_dsds)

{

	uint16_t	avail_dsds;

	uint32_t	*cur_dsd;

	scsi_qla_host_t	*ha;

	struct scsi_cmnd *cmd;



	cmd = sp->cmd;



	/* Update entry type to indicate Command Type 3 IOCB */

	*((uint32_t *)(&cmd_pkt->entry_type)) =

	    __constant_cpu_to_le32(COMMAND_TYPE_7);



	/* No data transfer */

	if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) {

		cmd_pkt->byte_count = __constant_cpu_to_le32(0);

		return;

	}



	ha = sp->ha;



	/* Set transfer direction */

	if (cmd->sc_data_direction == DMA_TO_DEVICE)

		cmd_pkt->task_mgmt_flags =

		    __constant_cpu_to_le16(TMF_WRITE_DATA);

	else if (cmd->sc_data_direction == DMA_FROM_DEVICE)

		cmd_pkt->task_mgmt_flags =

		    __constant_cpu_to_le16(TMF_READ_DATA);



	/* One DSD is available in the Command Type 3 IOCB */

	avail_dsds = 1;

	cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address;



	/* Load data segments */

	if (cmd->use_sg != 0) {

		struct	scatterlist *cur_seg;

		struct	scatterlist *end_seg;



		cur_seg = (struct scatterlist *)cmd->request_buffer;

		end_seg = cur_seg + tot_dsds;

		while (cur_seg < end_seg) {

			dma_addr_t	sle_dma;

			cont_a64_entry_t *cont_pkt;



			/* Allocate additional continuation packets? */

			if (avail_dsds == 0) {

				/*

				 * Five DSDs are available in the Continuation

				 * Type 1 IOCB.

				 */

				cont_pkt = qla2x00_prep_cont_type1_iocb(ha);

				cur_dsd = (uint32_t *)cont_pkt->dseg_0_address;

				avail_dsds = 5;

			}



			sle_dma = sg_dma_address(cur_seg);

			*cur_dsd++ = cpu_to_le32(LSD(sle_dma));

			*cur_dsd++ = cpu_to_le32(MSD(sle_dma));

			*cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg));

			avail_dsds--;



			cur_seg++;

		}

	} else {

		*cur_dsd++ = cpu_to_le32(LSD(sp->dma_handle));

		*cur_dsd++ = cpu_to_le32(MSD(sp->dma_handle));

		*cur_dsd++ = cpu_to_le32(cmd->request_bufflen);

	}

}





/**

 * qla24xx_start_scsi() - Send a SCSI command to the ISP

 * @sp: command to send to the ISP

 *

 * Returns non-zero if a failure occured, else zero.

 */

int

qla24xx_start_scsi(srb_t *sp)

{

	int		ret;

	unsigned long   flags;

	scsi_qla_host_t	*ha;

	struct scsi_cmnd *cmd;

	uint32_t	*clr_ptr;

	uint32_t        index;

	uint32_t	handle;

	struct cmd_type_7 *cmd_pkt;

	struct scatterlist *sg;

	uint16_t	cnt;

	uint16_t	req_cnt;

	uint16_t	tot_dsds;

	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;

	char		tag[2];



	/* Setup device pointers. */

	ret = 0;

	ha = sp->ha;

	reg = &ha->iobase->isp24;

	cmd = sp->cmd;

	/* So we know we haven't pci_map'ed anything yet */

	tot_dsds = 0;



	/* Send marker if required */

	if (ha->marker_needed != 0) {

		if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) {

			return QLA_FUNCTION_FAILED;

		}

		ha->marker_needed = 0;

	}



	/* Acquire ring specific lock */

	spin_lock_irqsave(&ha->hardware_lock, flags);



	/* Check for room in outstanding command list. */

	handle = ha->current_outstanding_cmd;

	for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {

		handle++;

		if (handle == MAX_OUTSTANDING_COMMANDS)

			handle = 1;

		if (ha->outstanding_cmds[handle] == 0)

			break;

	}

	if (index == MAX_OUTSTANDING_COMMANDS)

		goto queuing_error;



	/* Map the sg table so we have an accurate count of sg entries needed */

	if (cmd->use_sg) {

		sg = (struct scatterlist *) cmd->request_buffer;

		tot_dsds = pci_map_sg(ha->pdev, sg, cmd->use_sg,

		    cmd->sc_data_direction);

		if (tot_dsds == 0)

			goto queuing_error;

	} else if (cmd->request_bufflen) {

		dma_addr_t      req_dma;



		req_dma = pci_map_single(ha->pdev, cmd->request_buffer,

		    cmd->request_bufflen, cmd->sc_data_direction);

		if (dma_mapping_error(req_dma))

			goto queuing_error;



		sp->dma_handle = req_dma;

		tot_dsds = 1;

	}



	req_cnt = qla24xx_calc_iocbs(tot_dsds);

	if (ha->req_q_cnt < (req_cnt + 2)) {

		cnt = (uint16_t)RD_REG_DWORD_RELAXED(&reg->req_q_out);

		if (ha->req_ring_index < cnt)

			ha->req_q_cnt = cnt - ha->req_ring_index;

		else

			ha->req_q_cnt = ha->request_q_length -

				(ha->req_ring_index - cnt);

	}

	if (ha->req_q_cnt < (req_cnt + 2)) {

		if  (cmd->use_sg)

			pci_unmap_sg(ha->pdev, sg, cmd->use_sg,

					cmd->sc_data_direction);

		goto queuing_error;

	}



	/* Build command packet. */

	ha->current_outstanding_cmd = handle;

	ha->outstanding_cmds[handle] = sp;

	sp->ha = ha;

	sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle;

	ha->req_q_cnt -= req_cnt;



	cmd_pkt = (struct cmd_type_7 *)ha->request_ring_ptr;

	cmd_pkt->handle = handle;



	/* Zero out remaining portion of packet. */

	clr_ptr = (uint32_t *)cmd_pkt + 2;

	memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8);

	cmd_pkt->dseg_count = cpu_to_le16(tot_dsds);



	/* Set NPORT-ID and LUN number*/

	cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id);

	cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa;

	cmd_pkt->port_id[1] = sp->fcport->d_id.b.area;

	cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain;



	cmd_pkt->lun[1] = LSB(sp->cmd->device->lun);

	cmd_pkt->lun[2] = MSB(sp->cmd->device->lun);



	/* Update tagged queuing modifier -- default is TSK_SIMPLE (0). */

	if (scsi_populate_tag_msg(cmd, tag)) {

		switch (tag[0]) {

		case MSG_HEAD_TAG:

			cmd_pkt->task = TSK_HEAD_OF_QUEUE;

			break;

		case MSG_ORDERED_TAG:

			cmd_pkt->task = TSK_ORDERED;

			break;

		}

	}



	/* Load SCSI command packet. */

	memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len);

	host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb));



	cmd_pkt->byte_count = cpu_to_le32((uint32_t)cmd->request_bufflen);



	/* Build IOCB segments */

	qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds);



	/* Set total data segment count. */

	cmd_pkt->entry_count = (uint8_t)req_cnt;

	wmb();



	/* Adjust ring index. */

	ha->req_ring_index++;

	if (ha->req_ring_index == ha->request_q_length) {

		ha->req_ring_index = 0;

		ha->request_ring_ptr = ha->request_ring;

	} else

		ha->request_ring_ptr++;



	sp->flags |= SRB_DMA_VALID;

	sp->state = SRB_ACTIVE_STATE;



	/* Set chip new ring index. */

	WRT_REG_DWORD(&reg->req_q_in, ha->req_ring_index);

	RD_REG_DWORD_RELAXED(&reg->req_q_in);		/* PCI Posting. */



	spin_unlock_irqrestore(&ha->hardware_lock, flags);

	return QLA_SUCCESS;



queuing_error:

	if (cmd->use_sg && tot_dsds) {

		sg = (struct scatterlist *) cmd->request_buffer;

		pci_unmap_sg(ha->pdev, sg, cmd->use_sg,

		    cmd->sc_data_direction);

	} else if (tot_dsds) {

		pci_unmap_single(ha->pdev, sp->dma_handle,

		    cmd->request_bufflen, cmd->sc_data_direction);

	}

	spin_unlock_irqrestore(&ha->hardware_lock, flags);



	return QLA_FUNCTION_FAILED;

}